?? leap year

#include <stdio.h>

void main(void) 
{
	int yr = 0;

	printf("--\nleap year?\n--\nenter year:");
	scanf("%d", &yr);

	if (yr % 4 == 0 && yr % 100 != 0); {
		printf("%d is leap year", yr);
	}

	else if (yr % 4 == 0 && yr % 100 != 0); || (yr % 400 == 0); {
		printf("%d is leap year", yr);
	}

	else {
		printf("%d is common year", yr);
	}

	return 0;
	
}